The Latest Gartner® Magic Quadrant™Hyperconverged Infrastructure Software
Moderators: anton (staff), art (staff), Max (staff), Anatoly (staff)
Hello and Thanks for your reply.Michael.Blanchard2 wrote:I had similar issues at first, and what fixed it for me was:
1. Disabling all the cache, at that speed, cache is almost useless anyway.
2. What is the underlying network speed for the replication network? you have a separate network just for the replication right? it's over 1gb right?
3. iSCSI or SMB? Did you optimize the connect? disable un-needed protocols? disable nagle? jumbo frames?
4. I run infiniband (regretfully) and I did end up finding out I had a few settings wrong and a bad NIC that was affecting the replication
Vitaliy (Staff) wrote:Hello,
Could you please try next:
1. Use Microsoft DiskSPD utility for benchmarking:
https://gallery.technet.microsoft.com/D ... e-6cd2f223
Below are few commands for cmd and several patterns:
diskspd.exe -t6 -b4K -r -w0 -o64 -d60 -h -L -c50G D:\test.io > c:\test\4k_random_readSSD.txt
diskspd.exe -t6 -b4K -r -w100 -o64 -d60 -h -L -c50G D:\test.io > c:\test\4k_random_writeSSD.txt
diskspd.exe -t6 -b64K -r -w0 -o64 -d60 -h -L -c50G D:\test.io > c:\test\64k_random_readSSD.txt
diskspd.exe -t6 -si -b64K -w0 -o64 -d60 -h -L -c50G D:\test.io > c:\test\64k_seq_readSSD.txt
diskspd.exe -t6 -b64K -r -w100 -o64 -d60 -h -L -c50G D:\test.io > c:\test\64k_random_writeSSD.txt
diskspd.exe -t6 -si -b64K -w100 -o64 -d60 -h -L -c50G D:\test.io > c:\test\64k_seq_writeSSD.txt
Device size has to be more than 20 GB.
Avoid any caching on StarWind device so far.
2. Connect device in iSCSI initiator twice by loop back.
3. For understanding create an HA device and benchmark as well.
Vitaliy (Staff) wrote:Thank you for report.
Could you please create a replica, and test same HA device?
We need this for deep undestarding of the performance issue.
Also, below you can find the best practices for RAID controller:
RAID5 on SSD:
Disk cache policy: default/enabled;
Read policy: No Read Ahead;
Write Policy: Write Through;
Strip Size: 64 KB
Do they match with your environment?
100% I've setup This before several times, I also use the same configuration for my customers...Vitaliy (Staff) wrote:David,
Did you configure everything by this guide?
https://www.starwindsoftware.com/resour ... erver-2016
1. And customers have a good performance, right?verticalsoft wrote:
100% I've setup This before several times, I also use the same configuration for my customers...
I'm Just wondering if this is a bug with current version?
Hello,Vitaliy (Staff) wrote:1. And customers have a good performance, right?verticalsoft wrote:
100% I've setup This before several times, I also use the same configuration for my customers...
I'm Just wondering if this is a bug with current version?
2. No, we have not notieced the performance issue with the current build.
3. What SSD disks do you have?